Invention Grant
- Patent Title: Voltage sampling switch
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Application No.: US15951414Application Date: 2018-04-12
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Publication No.: US10295572B1Publication Date: 2019-05-21
- Inventor: Khoi Mai , Michael Todd Berens , Jon Scott Choy
- Applicant: NXP USA, INC.
- Applicant Address: US TX Austin
- Assignee: NXP USA, INC.
- Current Assignee: NXP USA, INC.
- Current Assignee Address: US TX Austin
- Main IPC: H03K5/00
- IPC: H03K5/00 ; G01R15/16 ; G01R19/00 ; H03K17/08 ; H03K5/24

Abstract:
A voltage sampling circuit and method are provided. The voltage sampling circuit includes a capacitor having a first terminal and a second terminal. A first pre-charge circuit is coupled to a first voltage supply terminal and to the first terminal of the capacitor. The first pre-charge circuit is configured to receive a first control signal and pre-charge the capacitor to a first voltage. A switch circuit includes a first transistor having a first current electrode coupled to an input terminal of the voltage sampling circuit, a control electrode coupled to the first terminal of the capacitor, and a body electrode coupled to the second terminal of the capacitor. A second transistor having a first current electrode coupled to a second current electrode of the first transistor, a body electrode coupled to the second terminal of the capacitor, and a second current electrode coupled to an output terminal of the voltage sampling circuit.
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